Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/utils/KMIndex.java @ 5645:696d710470f5

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flys/issue1077: Show loads as step line, therefore transform data in SedimentLoadFacet to stretch as in the measurement stations bounds. Deal with this new kind of data in the Generator.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 10 Apr 2013 09:35:07 +0200
parents 46511b4d8357
children
rev   line source
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ba62c1751f07 FixA: Added new serializable km inedx structure.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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1 package de.intevation.flys.utils;
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2
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3 import java.util.ArrayList;
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4 import java.util.Collections;
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5 import java.util.List;
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6 import java.util.Iterator;
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7
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8 import java.io.Serializable;
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9
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46511b4d8357 KMIndex: Minor doc.
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10 /** km to value, searchable. Tolerance is at 10cm. */
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11 public class KMIndex<A>
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12 implements Serializable, Iterable<KMIndex.Entry<A>>
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13 {
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14 public static final double EPSILON = 1e-4;
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15
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16 public static class Entry<A>
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17 implements Serializable, Comparable<Entry<A>>
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18 {
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19 protected double km;
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20 protected A value;
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21
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22 public Entry(double km) {
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23 this.km = km;
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24 }
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25
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26 public Entry(double km, A value) {
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27 this.km = km;
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28 this.value = value;
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29 }
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30
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31 public double getKm() {
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32 return km;
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33 }
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34
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35 public A getValue() {
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36 return value;
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37 }
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38
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39 public void setValue(A value) {
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40 this.value = value;
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41 }
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42
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43 @Override
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44 public int compareTo(Entry<A> other) {
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45 double diff = km - other.km;
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46 if (diff < -EPSILON) return -1;
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47 if (diff > +EPSILON) return +1;
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48 return 0;
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49 }
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50
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51 public boolean epsilonEquals(double km) {
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52 return Math.abs(this.km - km) < EPSILON;
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53 }
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54 } // class Entry
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55
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56
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57 protected List<Entry<A>> entries;
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58
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59 public KMIndex() {
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60 this(10);
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61 }
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62
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63 public KMIndex(int capacity) {
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64 entries = new ArrayList<Entry<A>>(capacity);
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65 }
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66
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67 public void add(double km, A value) {
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68 entries.add(new Entry<A>(km, value));
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69 }
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70
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71 public void sort() {
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72 Collections.sort(entries);
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73 }
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74
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75 public Entry<A> search(double km) {
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76 for (Entry<A> entry: entries) {
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77 if (entry.epsilonEquals(km)) {
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78 return entry;
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79 }
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80 }
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81 return null;
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82 }
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83
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84 public Entry<A> binarySearch(double km) {
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85 int index = Collections.binarySearch(entries, new Entry<A>(km));
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86 return index >= 0 ? entries.get(index) : null;
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87 }
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88
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89 public Iterator<Entry<A>> iterator() {
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90 return entries.iterator();
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91 }
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92 }
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93 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org